/Engine/Source/Runtime/Engine/Classes/Engine/GameInstance.h
Get a Subsystem of specified type
[UGameInstanceSubsystem](API\Runtime\Engine\Subsystems\UGameInstanceSubsystem) * GetSubsystemBase ( [TSubclassOf](API\Runtime\CoreUObject\Templates\TSubclassOf)< [UGameInstanceSubsystem](API\Runtime\Engine\Subsystems\UGameInstanceSubsystem) > SubsystemClass ) const